Attachment for ore-concentrating jigs



Aug. 11. 1925.

s. H. B OYLAN ATTACHMENT FOR`ORE CONCENTRATING JIGS 2 Sheets-Sheet 2 l l ////r Filed Jan. 19.

Patented Aug. ll, 1925.

UNITED STATES trata SAMUEL H. BOYLAN, F JOPLIN, MISSOURI.

ATTACHMENT FOR ORE-CONOENTRATING JIGS.

Application led January 19, 1923.

To all who/m, z' may concern:

Be it known that I, SAMUEL H. BoYLAN,

a citizen of the United States, residing at Joplin, in the county of JasperI and State of Missouri, have invented certain new and useful Improvements in Attachments for Gre-Concentrating Jigs, of which the following is a specification.

rIhis invention relates to attachments for ore concentrating jigs, and mo-re particu larly to automatic draw-off mechanism therefor.

The invention relates to jigs used in separating lead and zinc ores from rock, and other waste material after the mine runhas been crushed. These jigs consist of a casing having a screen over which the ore is passed, and containing a body of water which is agitated to settle the ore.

I-Ieretofore, it has been impossible to eiiiciently withdraw the ore from the screen. The best jigging method is to maintain a constant bed of clean ore adjacent the top of the grate and to draw off the ore as it y accumulates above a certain depth, the ore being withdrawn from the bottoni without disturbing the surface of the bedding ore.

In the present invention, I provide a jig of the usual construction, consisting of a casing having a grate, and I further employ an automatic draw-off consist-ing of a trough having its upper surface in alinement with the grate, and forming a port-ion thereof. ThisI trough extends through an opening in the side of the casing, and a receptacle is pivotally mounted therein. The

ore collecting on the grate passes into this receptacle, which is normally closed at its outer end by an automatic valve. When the weight of the material within the receptacle is suiicient to move the receptacle, the valve is opened and a `portion of the inaterial discharged. As soon as the weight decreases sufiiciently by the discharge of material, the receptacle returns to its normal position.

By means of this construction, an automatic draw-olf is obtained which will maintain a constant depth of ore on the grate, and which discharges from the bottom.

In the accompanying drawings, I have shown one embodiment of the invention. In this showing: v

Figure 1 is a front elevation of a jig comprising a plurality of independent cells,

Serial No. 613,752.

Figure 2 is a transverse sectional view on line 2--2 of Figure 1,

Figure 3 is a plan view,

Figure 4 is a longitudinal vertical sectional view on line 4 4 of Figure 3, and,

Figure 5 is a detail sectional' view of the trough and receptacle.

Referring to the drawings, the reference numeral 1 designates generally a casing forming the jig. In this instance, I have shown a consisting of a plurality of separate cells 2, 8, and 4f, separated from each other by transverse partitions 5. As shown, the partition walls are of diiferent height,

the upper edge of each wall being lower than the upper edge of the adjacent wall to the left. IIhe front wall of the trough is likewise provided with vertical portions 6, separating the upper edge of the adjacent cells, whereby the wall is gradually lowered toward the right.

Each of the cells is provided with a guide frame 7 having a plunger 8 operating therein. The plunger is connected to a rod 9, having an eccentric 1() on its upper end. This eccentric surrounds a shaft 11, which extends the entire length of the and is mounted in suitable hearings 12. The shaft may be driven in any suitable manner, as by a belt (not shown) passing over a pulley 13 on the shaft. rI`he section of the cell not occupied by the guide frame is provided with a grate or screen 14. As shown, the grate is provided with the usual rectangular openings 15 for the passage of water. The grate is supported on suitable bars 17, secured to the front wall of the casing and to the guide frame. Intermediate the partition walls, the grate is provided with an open portion adapted to receive the upper edge of a trough 18. As shown, the cross-sectional area of the trough is equal to the size of the opening in the grate and it is adapted to completely fill this opening. The upper edge of the trough is provided with a flange 19, adapted to rest upon the grate and the supporting bars 17. The bottom of the trough is provided with an inclined wall 20, and the front of the receptacle is provided with an opening 21, eX- l tending through an opening in the front of the casing. A receptacle 22 substantially similar in shape to the trough is arranged therein and is pivotally mounted on pins 23 arranged at the rear and passing through the walls of the trough. Suitable packing adapted to` pivotally support an arm 28. A

weight 29 is secured to the outer end of this arm and a link 30 is secured to the limer end of thearm. This link is connectedto a pair ot' ears 3l, arranged on the spout 25.Y

A second link 82 is arranged intermediate the ends of the arm 28 and the lower end of this link is connected to a bracket 33, arranged on a valve 34,'adapted to'close 'the lower end of the spout. A bracket is provided with an arm 85, extending over the spout, pivotally'supported in a pair of ears 36, arranged thereon.

In operation, the ore is i'ed over the grate in the usual manner, and is agitated by the reciprocation et tne piston `or' plunger in the guide traine which causes the water to flow upwardly through the grate. By providing a plurality ot cells arranged at ditferent elevations, with the grates similarly arranged as shown in lEigure tot the drawings, the material may be fed to 'the jig at one end and permitted to tlow over the entire length. rllhe ore concentrated in each cell settles on the grate in the usual mai ner, and the heavier material passes through the open, upper end ot the receptacle 18 vinto the trough When the weight oic the inaterial in the receptacle 22 becomes siiiieient to overcome the weight 29, the trough automatically lowers and thus opens Vthe valve 3st, pern'iitting discharge or' a portion o't'the contents. rl`he material will discharge troni the receptacle until the weight ot the contained material becomes insuiiieient to retain the receptacle in lowered position when the weight 2f) will return it to normal position and close the valve 3f-l. This operation will be repeated as long as the material is ted to the receptacle and it will thus be seen that the vore is removed from the bottom oj the grate and a substantially constant level oi material maintained on the grate at all times.

lt is to be understood that the` form of my invention herewith shown and described iste be taken Vas a preferred example of the saine, and that various changes in the shape, size, and arrangement ol parts may be resorted to without departing from the spirit or the invention or the scope of the subjoined claims.

Having thus described my invention, l claim:

l. iin attachment for jigs'comprising a trough extending downwardly from the grate of the jig, said trough being provided with an .inclined bot-tom, a receptacle mounted'in Vsaid trough and shaped to contorni substantially to the shape ofthe trough, the ore on said grate being adapted to settle in said trough, and means controlled' by the veight or the ore to remove it from Said receptacle.

2. An attachment for' jigs comprising a trough extending downwardly from the grate ot the jig, said trough being provided with an inclined bottom extending through the side ot the jig, a receptacle pivotally mounted therein and provided with a spout projecting troni the jig, a valve adapted to close said spout when in one position, said receptacle being adapted to lower `to open said spout when the weight of the ore therein exceeds a predetermined limit, and means for returning said receptacle to normal position. i Y

` 3. An attachment `tor comprising a trough extending downwardly 4trom thegrate ot' the jig, said trough being provided with an inelined bottom extending through the -side ot the jig, a receptacle pivotally nionnted therein and provided with a spout projecting from the jig', a valve adapted to close said spout when in one position, said receptacle being adapted to lower to open said spout when the weight of the ore therein exceeds a predetermined limit, and a weight connected to said receptacle to return it to normal position.

In testimony whereof, I aiiix Amy signature in presence of a witness.

lVitness H. J.- Kiwee. 

